You are right ..There are no plausible justifications for all the bad things done by Mahi. But I am a sucker for underdog and I would give him a chance before crucifying him.
My view point
Mahi has been 24x7x365x 32???? Abused by his mother and others for no fault of his...In his self defence he attacked those who abused him and as a consequence he turned out to a outcast and irresponsible. I suppose he was not encouraged to do the right thing or advised to choose a better path...he just followed a monster of his mother and turned up an antithesis of decent fellow. From his flash backs he was never given a chance to grow up as a normal child. We all know circumstances make a person a bad or good...
He would have grown up like a normal decent kid had he got the support from his mother...nevertheless we see some strains of decency in him...he is not after money like his mother ...he wants something more ..guess he wants to accepted by his father (am sure Kameeni has filled his ears against the Oberois)
He has misconstrued the whole situation courtesy Kameeni...and is a pawn in hands of a mastermind ( as addressed by Shivaay)...
Compared to Tia and her gang, Mahi is nothing...he is not out to kill anybody in cold blood and also he is not out to destroy the Oberois...he wants to so called justice for being not accepted as Oberoi ( don't know what Kameeni has told him)
However, I feel outraged by the duplicity of ACP, he is a man of law and but he is out on a personal vendetta against the Oberois...
I also feel that Kameeni was never in love with Sakthi and Mahi is not her son (though initially I did think he was as she put with all that those taunts)..
If she was pregnant why didn't she inform Sakthi about it.
Am still cracking my brain over Daksh and his role as Kameeni's brother ...
Well I leave it to the CVs to come out with a reasonable explanation ...